Metal-bending machine.



Patented May 2|, 190|.

c. nEcRETTE. METAL BEN'DING MACHINE.

(Application led Aug. 1, 1900.)l

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f Patented May 2|, 19m.'

C. DECRETTE. METAL B ENDING MACHINE.

(Application iled Aug. 1, 1900.) (No Model.) 2 Shasta-Sheet 2.

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A noa/v5 Ys NITE STATES CHARLES DECRETTE,

OF NEV YORK, N. Y.

METAL-BENDING IVIACHIN E.

SPECIFICATION forming part of Letters Patent No. 674,574, dated May 21,1901.

Application tiled August l, 1900l Serial No. 25,524. (No model.)

T all whom, t may concern:

Be it known that' I, CHARLES DEORETTE, a citizen of the United States,and a resident of the city of New York, borough of Manhattan, in thecounty and State of New York, have invented a new and Improved Metal-Bending Machine, of which the following is a full, clear, and exactdescription.

This invention relates to improvements in machines for bending metalbars; and the object is to provide a simple machine of this character bymeans of which the metal may be turned ata sharp angle at one operationand requiring but one heating of the metal, thus materially saving intime and consequent expense as compared with the bending-machines inwhich several beatings of the metal are required.

I will describe a metal-bending machine embodying my invention and thenpoint out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which'similar characters of reference indicatecorresponding parts in all the figures.

Figure l is a plan View of a bending-niachine embodying my invention.Fig. 2 is a front elevation. Fig. 3 is a section on the line :c of Fig.2, showing the position of parts after bending a strip of metal. Fig. 4is a section on the line y y of Fig. 2, and Fig. 5 is a section on theline z e of Fig. 2.

The machine comprises a base l, from the rear side of which a standard 2extends upward and forward, and on the upper end of this standard is afixed bending-head 3 and a swinging bending-head 4. The upper end of theswinging head 4 swings on a lug 5, attached to the head 3, and the lowerportion of this swinging head 4 has a block 6, from which a pivot rod 7extends downward through a bearing 8 and also through a bearing 9 at thelower end of the upright 2. Extended outward from the fixed head 3 is atable consisting of side bars l0 and 11,'connected at the outer end to ablock l2, from which a brace 13 extends downward to a connection withthe base 1. Adjustable along this table, consisting of the bars 1U andll, is an abutment-block 14, the body portion of which is provided atthe front or inner side with a slot l5 in which the web of a wedgeshapedadjusting-block 16 may slide, and

this adjusting-block is held as adjusted by means, as here shown, of apin 17, passing through openings in the block 14 and through either oneof a series of openings in the block 16. The lower portion of the block14 passes between the sid-e bars l0 and 1l and is provided with toothedplates 1S, designed to engage with teeth formed on the under side ofsaid bars l0 and ll, so as to securely hold the block as adjustedlengthwise of the table. When adjusted, the parts may be clampedtogether by means of a bolt -l9.

Extended outward from the swinging head 4is a table'similar to thefirst-named tablethat is, it consists of the side bars l0 and l1 and theadjusting device movable thereon similar to the first-named adjustingdevice, the parts being .indicated by the same numerals. s

At the inner end of the fixed table a holding-block 2O is mounted toslide against a guide-block 21 and underneath a guide-plate 22, securedon the upper side thereof. From this guide-block 20 an arm 23 extendsoutward, and from the arm 23 an arm 24 extends t0 a fixed connectionwith a rod 25. The arm 24 has pivotal .connection with the arm 23, asplainly shown in the drawings, and the rod 25 has bearings 26 and 27 atthe inner end of the fixed table. The upper end of thisxed rod 25 isprovided with ahandle 28. Asimilar sliding guide-block 29 is adapted tomove on the inner end of the swinging table and is guided by the block30 and the top plate 3l, and on this block 29 is an arm 32, pivotallyconnected to an arm 33', extended from a vertical rod 34, provided witha handle 35 on its upper end and having bearings at its lower portion inprojections 36 37.

The holding-blocks 2l and 29 are provided on their inner surfaces or onthe sides adjacent to the bending-heads with longitudinal channels toreceive the metal strip to be bent, as plainly indicated in Fig. 4. Fromthe outer end of the swinging table a brace-rod 38 extends down to aconnection with a collar39, attached to the lower end of the pivot boltor Vrod 7 In operation the metal bar after being heated sufliciently isplaced in the machine, as indicated clearlyin Fig. 2-that is, it is IOOplaced with the part to be bent against the bending-heads 3 and 4 whensaid heads are in alinement. Then the` adjusting devices on the tablesare to be moved up against the ends of the strip and irmly clamped. Theclose or fine adjustments against the ends of the strips may be made bymoving the wedgeshaped blocks 1G. After this the rods 25 and 34 are tobe turned in a direction to move the holding-blocks 2l and 29 intoengagement with the strip, the inner or adjacent ends of saidholding-blocks being near the point to be bent- Now the swinging tableis to be swung forward sufficiently to bend the strip to the requiredangle. After the bending of course the rods 25 and 34 are to be rot atedto disengage the holding-blocks 2l and 29 from the strip, so that it maybe readily removed.

Having thus described my invention, I claim as new and desire to secureby Letters Patentl. In a machine for bending metal, a iixedbending-head, a bending-head mounted to swing, supporting-tablesextended outward from said heads, adjusting devices movable on saidtables, channeled holding-blocks, and means for slidin'g saidholding-blocks toward and from each other lengthwise of the tables,substantially as specified. v

2. A machine for bending metal, comprising a stationary bending-head, aswinging bending-head, tables extended outward from said bending-headsand each consisting of two side bars, adjusting-blocks movable betweenthe side bars, means for clamping said blocks as adjusted on the tables,wedgeshaped adjusting-blocks for engaging with the first-namedadjusting-blocks, longitudinally-movable holding-blocks provided withchannels to receive the bar to be bent, and means for moving saidholding-blocks, substantially as specified.

,3. A machine for bending metal, comprising a standard, a fixedbending-head on said standard, a bending-head mounted to swingrelatively to the standard, tables extended outward from Said heads,adjustable clamping or adjusting blocks movable on said tables,holding-blocks movable toward and from each other provided with channelsto re- -ceive the bar to be bent, vertical rotary rods,

arms extended from said rods and having pivotal connection with theholding-blocks, and guides for said blocks, substantially as specified.

4. A machine for bending metal, comprising a standard, a fixedbending-head on said standard, a bending-head mounted to swing on saidstandard, tables extended outward from the heads, one being mounted toswing with the swinging head, clamping or adjusting devices havinglocking engagement with said tables, and devices for engaging a bar tobe bent near its point of bending, the said devices being mounted toslide, substantially as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CHARLES DECRETTE. fL. s]

Witnesses:

FRANK OswALD, WILHELM FLSCHNER.

